New fused bis-thienobenzothienothiophene copolymers and their use in organic solar cells and transistors

Laure Biniek*, Bob C. Schroeder, Jenny E. Donaghey, Nir Yaacobi-Gross, Raja Ashraf, Ying W. Soon, Christian B. Nielsen, James R. Durrant, Thomas Anthopoulos, Iain Mcculloch

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

A new tetradodecyl-substituted DTBTBT donor unit is synthesized by a specific bis-annulation via Suzuki-Miyaura coupling and successfully incorporated into light absorbing electron donor copolymers for OPV and hole and electron transport OFET polymer devices. All copolymers (DTBTBT-co- benzothiadiazole (Bz), DTBTBT-co-thiophene (T) and DTBTBT-co-thienothiophene (TT)) show fully coplanar backbones and strong intermolecular interactions. The DTBTBT-Bz copolymer led to a deep HOMO level (-5.2 eV) and thus a large V oc value of 0.92 V with PC71BM as electron acceptor and a PCE of 3.7% with a Jsc of 6.78 mA/cm2 could be obtained. A hole mobility of 0.1 cm2/(V s) has been observed for the highly coplanar and more crystalline DTBTBT-T copolymer.

Original languageEnglish (US)
Pages (from-to)727-735
Number of pages9
JournalMacromolecules
Volume46
Issue number3
DOIs
StatePublished - Feb 12 2013

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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